As
@imnvs mentioned above, that's actually a correct response from Queen Abigail. Of course, the running joke is she is eating the minerals you give her but I kind of suspect she's dabbling in magic behind the scenes (see other theory about The Wizard and Abigail).
Then again, Abigail could be an aspiring alchemist/scientist and is conducting experiments with them, but that's what is fun about these moments is their not fully clear and give a lot of different clues to create fan theories and speculations which are always fun conversations!
Enjoy your game
@Wuselding